Oracle 我们可以像在Java中一样在PL/SQL中创建嵌套包吗？

create or replace package pkg as 
  package pkg_nested as 
    var integer;
  end;
end;
/
sho err

LINE/COL ERROR
-------- -----------------------------------------------------------------
2/22     PLS-00103: Encountered the symbol "AS" when expecting one of the following:
         := . ( @ % ; not null range default character
5/1      PLS-00103: Encountered the symbol "END"

create or replace package pkg as 
  var int;
end;
/
sho err

No errors.

create or replace package body pkg as 
  package pkg_nested as 
    var integer;
  end;
end;
/
sho err

LINE/COL ERROR
-------- -----------------------------------------------------------------
2/22     PLS-00103: Encountered the symbol "AS" when expecting one of the following:
         := . ( @ % ; not null range default character
5/1      PLS-00103: Encountered the symbol "END"

create or replace procedure p as
  procedure p_nest as
    procedure p_nest2 as
      procedure p_nest3 as
      begin
        dbms_output.put_line('Nested');
      end p_nest3;
    begin
      p_nest3();
    end p_nest2;
  begin
    p_nest2();
  end p_nest;

begin
  p_nest();
end p;
/

exec p();

Nested